#ifndef _Ultrasonic_wave_control_H_
#define _Ultrasonic_wave_control_H_
#include "at32f4xx.h"
extern void Ultrasonic_init(void);
extern u8 Ultrasonic_get_distance_one(void);
extern u8 Ultrasonic_get_distance_two(void);

extern void  App_Printf(char *format, ...);
#endif
